I realize this is a lot of ducks and some are duplicates, but some seem different to me. The sparrow looks like a couple of different ones to me, and the killdeer was REALLY small compared to others I've seen.

Thank you!

1.

2.

3.

4. The one on the left looks different to me from the one on the right

5.

6. Same with this one, the one on the left looks different to me from the one on the right

7. Wondering about the white ones - Sorry for the horrible image, they were REALLY far away

Perhaps others will take the time to squint at them, but it's going to be tough to be 100% sure on them. From what I can see in #6 those look like Lessers, which would be the more likely option on an inland lake in Ohio.